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mr=200g
C%=15%
ms=200*15/100=30g
mr=ms+mrozp
mrozp=mr-ms
mropz=170g
Odp.masa substancji potrzebnej to 30g a rozpuszczalnika to 170g.
Mr=200g Ms=?
Cp=15% Mrozp.=?
Ms=Cp x Mr/ 100%
Ms= 15% x 200g /100% = 30 g
M rozp= Mr-Ms
Mrozp.= 200g - 30 g = 170 g
Odp. 30 g soli kuchennej i 170 g wody.